Enough to rattle the windows in your house at half power

when it is crank up it rattled the windows and the china in the cabinet even causes my acoustic guitar to stump open cord without max volume as you can tell I am impress by this

It'll rumble walls but won't blow out windows (probably due more to 15" subwoofer size than lack of quality) - ultimately a fair and solid value for the price.

It goes from a solid low end to shaking the windows in volume all while keeping a clear sound

This sub literally rattled the windows in my home at lessential than half power while testing it out